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MINITAB 18 WORKBOOK SOFTWARE

When selecting the analysis side for attribute data, a second panel is displayed.When setting up the study, you will need to provide the true status for each item in order for Minitab to create the Reference Standard column.Whichever path you choose, you then have two options, either to set up the study which will create the data collection form for you, or the analysis side which will perform the calculations.Attribute data analysis is on the right side of the first diamond and is labelled "appraisal".When selecting Measurement Systems Analysis the wizard panel shown below appears. Minitab provides a wizard for measurement systems analysis that is found under the "Assistant" pull down menu. The system effectiveness is the number of times that all appraisers agreed on all trials with each other and the reference standard for an item divided by the number of items and that converted to a percentage. Appraiser #1 = 2 occurrences, Appraiser #2 = 1 occurrence, Appraiser #3 = 0 occurrences.Appraiser #1 = 2 occurrences, Appraiser #2 = 4 occurrences, Appraiser #3 = 2 occurrencesįalse Alarm Rate is based upon the Appraiser assessing a “Fail” for what should be a “Pass.” The False Alarm Rate is the number of times that occurred divided by the number of assessments of units whose true status was “Pass” and that converted to a percentage.The Miss Rate is based upon the Appraiser assessing a “Pass” for what should be a “Fail.” The Miss Rate is the number of times that occurred divided by the number of assessments of units whose true status was “Fail” and then converted to a percentage. Appraiser #3 – first pass = 24 times, – second pass 24 times.

Appraiser #2 – first pass = 22 times, – second pass 23 times.

Appraiser #1 – first pass = 24 times, – second pass 22 times.

First is the measure of accuracy, which is the number of times that each appraiser correctly assessed the item value divided by the total number of inspections and then converted to a percentage. The accuracy measures will include the use of the Reference Standard column in the comparisons. Reproducibility is the calculation of the number of times all Appraiser #1 = all Appraiser #2, all Appraiser #1 = all Appraiser #3, and all Appraiser #2 = all Appraiser #3 divided by three times the number of items and then converted to a percentage. The System Repeatability is the average of those three: (92% + 88% + 100%)/3 = 93.3% This is done by determining the number of times an appraiser is consistent in their evaluation (which is the match column) divided by the number of items, and then converted to a percentage. Repeatability calculations are first conducted at the individual level first. It is for a study with three Appraisers, 25 items, and two trials. This example will be based upon the data set shown below. When doing your first few Gage R&R Studies, you will want to refer to the example to guide you through the process.

MINITAB 18 WORKBOOK SOFTWARE

The same example is then demonstrated the statistical software program Minitab, which is often used to conduct analyses for Lean Six Sigma projects. This example is demonstrated using comparison equations with a spreadsheet in Microsoft Excel. Web Page (*.htm *.html): Save the data in an html file.An example of an attribute data Gage R&R analysis will illustrate the power of the technique.Excel (*.xls) or Spreadsheet XML (*.xml): Save the data in an Excel file.Some older applications might support only ANSI. Unicode was developed to represent more characters and to be independent of the user's locale. You can save text files using either ANSI (sometimes called ASCII) or Unicode encoding. You can import text files into many applications. Text (ANSI) or CSV (ANSI) (text files): Use text files to transfer the data between Minitab and other applications.You can save Minitab worksheets down to release 14. You can send a Minitab worksheet file to a Minitab user without sending the entire project.

You cannot print or edit a Minitab worksheet file outside of Minitab.

Minitab (MTW): Contains all the information in the Minitab worksheet.

In Save as type, select the type of file.

Browse to a location for the file and enter a name in File name.

With the worksheet active, choose File > Save Worksheet As.

To export data from a project, you can save a Minitab worksheet separately from the project.